Knocking noise on rear suspension

[kovmps6]

Hey guys

There has been a knocking noise from the rear on my mps3 hatch gen1 ever since I bought this car second hand. And it's pissing me off I have sent it to Mazda three times and it is still there...... Seriously.....
First they said it's normalSeconds I brought it to another dealer and they found a knocking noise and replace the rear right end link.
Third it was still there and they thought repositioning the rear seat would fix a knocking noise from the suspension... Seriously man lol
What can it be loose shock? I want to send it back because they found the fault under warranty and don't want it back till it's fixed..

got my service done yesterday and asked mazda to look into a knock at the rear.. they come back with "tightened all suspension items" seems normal !only happens over big bumps and seems like something is loose..!

might take out all the jack pieces and failing that do the $14 pedders check..

[markeymagz]

Hey guys after speaking to Mazda they said it was fine to go to pedders and get a report from them and confirm if that is it. Pedders found that the shock valves were making a knocking noise. Which then I told Mazda about it and they still stuffed me around saying that they have to check it themselves and that pedders report is nothing to them and NOW may not be coverd under warranty.
Pretty much they have to send in a request and if Mazda accepts they will fix it..

But why so much stuffing around.....

I'm thinking of just chucking in coilovers. What are good coilovers for the 3?

Thanks guys for the replys